A real tour de force by Professor John Horgan, which starts with:
Terrorist deradicalization. What an intriguing idea for a quick fix if ever there was one. Yet never in the history of counter-terrorism has any short-term solution ultimately proven to be more than a naïve pipedream. That is not to suggest that what is commonly called “deradicalization programs” would see themselves as representing a quick fix. But the allure surrounding these creative approaches to counterterrorism has been so powerful that a seeming failure to deliver on the implicit (and vague) promise of “revers[ing] radicalism” has apparently led to a loss of popularity. That may not be a bad thing, but a critical question lingers around whether or not these programs are effective.
Link:http://www.e-ir.info/2013/07/29/full...tion-programs/

Effectiveness and value for money he writes cannot be judged as so little independent, academic evaluation has actually happened.